Problemi con Avcapturession in modalità orizzontale su iPad
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27-12-2019 - |
Domanda
Ho cercato di catturare fotogrammi dalla fotocamera anteriore e presentarlo sulla vista.Ecco il mio codice
_session = [[AVCaptureSession alloc] init];
_session.sessionPreset = AVCaptureSessionPreset640x480;
AVCaptureDevice *device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];
NSError *error = nil;
AVCaptureDeviceInput *deviceInput = [[AVCaptureDeviceInput alloc] initWithDevice:device error:&error];
if (deviceInput) {
[_session addInput:deviceInput];
}
else {
DDLogInfo(@"Some wierd shit happened");
return;
}
// Session output
/*
AVCaptureMetadataOutput *output = [[AVCaptureMetadataOutput alloc] init];
[output setMetadataObjectsDelegate:self queue:dispatch_get_main_queue()];
[_session addOutput:output];
output.metadataObjectTypes = @[AVMetadataObjectTypeFace];
AVCaptureConnection *connection = [output connectionWithMediaType:AVMediaTypeMetadata];
connection.videoOrientation = AVCaptureVideoOrientationLandscapeLeft;
*/
// Session output
AVCaptureMovieFileOutput *videoOutput = [[AVCaptureMovieFileOutput alloc] init];
[_session addOutput:videoOutput];
AVCaptureConnection *connection = [videoOutput connectionWithMediaType:AVMediaTypeVideo];
connection.videoOrientation = AVCaptureVideoOrientationPortrait;
// Preview layer
_previewLayer = [AVCaptureVideoPreviewLayer layerWithSession:_session];
_previewLayer.videoGravity = AVLayerVideoGravityResizeAspectFill;
_previewLayer.frame = CGRectMake(0, 0, self.middleView.frame.size.width, self.middleView.frame.size.height);
[self.middleView.layer addSublayer:_previewLayer];
[_session startRunning];
.
Problema con questo è, quando il mio iPad è orizzontale, le immagini sullo strato di presentazione vengono ruotate di 90 gradi.Come posso aggiustare questo?Ho navigato a strappare il trabocco, cercando di fare qualcosa con AVCaptureConnection
, ma ahimè non disponibile.
Soluzione
ha risolto, ora funziona in tutti gli orientamenti.Dobbiamo impostare questo
_previewLayer.connection.videoOrientation = [self videoOrientationFromCurrentDeviceOrientation];
.
Dove il metodo è:
- (AVCaptureVideoOrientation) videoOrientationFromCurrentDeviceOrientation {
switch (self.interfaceOrientation) {
case UIInterfaceOrientationPortrait: {
return AVCaptureVideoOrientationPortrait;
}
case UIInterfaceOrientationLandscapeLeft: {
return AVCaptureVideoOrientationLandscapeLeft;
}
case UIInterfaceOrientationLandscapeRight: {
return AVCaptureVideoOrientationLandscapeRight;
}
case UIInterfaceOrientationPortraitUpsideDown: {
return AVCaptureVideoOrientationPortraitUpsideDown;
}
}
}
.
Anche sull'uscita Capture dobbiamo impostare:
AVCaptureConnection *output2VideoConnection = [videoOutput connectionWithMediaType:AVMediaTypeVideo];
output2VideoConnection.videoOrientation = [self videoOrientationFromCurrentDeviceOrientation];
. Altri suggerimenti
In Swift 3 :
Per prima cosa dobbiamo impostare previewLayer.connection.videoOrientation
come Megamanx do
previewLayer.connection.videoOrientation = self.videoOrientationFromCurrentDeviceOrientation()
.
Dove il metodo è:
func videoOrientationFromCurrentDeviceOrientation() -> AVCaptureVideoOrientation {
switch UIApplication.shared.statusBarOrientation {
case .portrait:
return AVCaptureVideoOrientation.portrait
case .landscapeLeft:
return AVCaptureVideoOrientation.landscapeLeft
case .landscapeRight:
return AVCaptureVideoOrientation.landscapeRight
case .portraitUpsideDown:
return AVCaptureVideoOrientation.portraitUpsideDown
default:
// Can this happen?
return AVCaptureVideoOrientation.portrait
}
}
.
Quindi dobbiamo anche gestire il videoOrientation
quando l'utente ruota il dispositivo (Metodo provengono da qui ) Igienico
.override func viewWillTransition(to size: CGSize, with coordinator: UIViewControllerTransitionCoordinator) {
coordinator.animate(alongsideTransition: { (UIViewControllerTransitionCoordinatorContext) -> Void in
self.previewLayer.connection.videoOrientation = self.videoOrientationFromCurrentDeviceOrientation()
}, completion: { (UIViewControllerTransitionCoordinatorContext) -> Void in
// Finish Rotation
})
super.viewWillTransition(to: size, with: coordinator)
}